At the grandson's wedding, the children's grandparents are usually one of the guests, and they can sit in the seats prepared for the guests. Specifically, if the wedding is held indoors, grandparents can sit in chairs or guest seats with other important family members. If the wedding is held outdoors, they can sit in the seats arranged for the guests and enjoy the wedding ceremony with other distinguished guests.

Of course, the children's grandparents can also choose different seats according to their own preferences and arrangements, depending on personal circumstances and the specific circumstances of the wedding arrangements.